Health · Facts & sources
4 sourced facts about human skin, each with the context behind the number. 4 more are in today's round and appear here after it closes.
Answerabout 99%
Early detection makes an enormous difference with melanoma: survival drops sharply once the cancer spreads to distant parts of the body.
Source: American Academy of Dermatology aad.org
Answerabout 9,500 people a day
That daily rate adds up to millions of new skin cancer diagnoses in the U.S. every year, most of them highly treatable if caught early.
Source: American Academy of Dermatology aad.org
Answerup about 145%
Basal cell carcinoma rates more than doubled over that period, a trend dermatologists link partly to cumulative sun exposure over a lifetime.
Source: American Academy of Dermatology aad.org
Answerabout 60,000 melanocytes
That same square inch of skin also holds roughly 19 million skin cells, 1,000 nerve endings, and 20 blood vessels.
Source: Cleveland Clinic (2024) my.clevelandclinic.org